Not Marv..
But take a look at some basic crate engines. GM has some pretty honest power numbers on there engines. Look at hp per cube. From there you have a base line to work with. It gets harder and harder to increase that power per cube with a small engine. And still keep it as a street engine.
Being that I have owned several 383 engines I would say that with the intake you have and that cam. You did not list carb or header tube size. but lets say 1 3/4 and a 750 carb. That it will make in the 425-450 range for hp. Nothing wrong with that at all. As I had a engine very close to that and it made 432 hp but the tq was just over 45o and it came on very quick and was broad. It was a great engine for the street. 1/4 mile times in the 70 GMC where mid 12's..
